基于正交试验法的二维方腔相变传热影响因素的数值分析

NUMERICAL ANALYSIS OF FACTORS AFFECTING 2D SQUARE CAVITY PHASE CHANGE HEAT TRANSFER BASED ON ORTHOGONAL EXPERIMENT METHOD

以单元内相变材料熔化完成时间为试验指标,换热温差、高宽比、倾角为影响因素,运用正交试验法设计二维方腔数值模拟试验,并通过极差分析与方差分析研究各因素及其交互作用对单元平均熔化传热速率的影响程度,且两种分析方法得到的结果一致。研究结果表明:在设计与优化方腔相变单元时(换热温差20~40℃,高宽比1~4,倾角0°~60°),应着重考虑换热温差与倾角两个关键参数以及高宽比与倾角的交互作用,适当考虑高宽比的影响,可不考虑换热温差与高宽比以及换热温差与倾角的交互作用。

Taking complete melting time of the phase change materials in cavity as test index, and heat transfer temperature difference, aspect ratio and tilt angle as impact factors, the two-dimensional square cavity numerical simulation experiment was designed based on orthogonal experiment method. The range analysis and variance analysis were used to study the incidence of various factors and their interactions on the average melting heat transfer rate of the unit, and the test results of two analysis methods are consistent. The research results indicate when the square cavity containing phase change materials is designed and optimized （heat transfer temperature difference 20-40 ~C, aspect ratio 1-4 and tilt angle 0-60~ ）, the heat transfer temperature difference, tilt angle two key parameters, and the interaction of aspect ratio and tilt angle have to be considered emphatically, and the aspect ratio has to be given due consideration. The interaction of aspect ratio and tilt angle with heat transfer temperature difference can be disregarded.